#content{
    width: 50%;
    margin: 20px auto;
    border: 1px solid #cbcbcb;
}
form{
    width: 50%;
    margin: 20px auto;
}
form div{
    margin-top: 5px;
}
#img_div{
    width: 80%;
    padding: 5px;
    margin: 15px auto;
    border: 1px solid #cbcbcb;
}
#img_div:after{
    content: "";
    display: block;
    clear: both;
}
img{
    float: left;
    margin: 5px;
    width: 300px;
    height: 140px;
}